Since the Federal Communication Commission (FCC) issued a license for 3.1 – 10.6 GHz frequency spectrum unlicensed radio applications, many papers have been published regarding ultrawideband (UWB) antenna design. The issue of UWB design is determining how to create an with wide bandwidth, capable rejecting communication systems that coexist bands, and designing antennas multiple input output (M...

In this manuscript, the problem of detecting multiple targets and estimating their spatial coordinates (namely, range xmlns:xlink="http://www.w3.org/1999/xlink">direction arrival electromagnetic echoes) in a xmlns:xlink="http://www.w3.org/1999/xlink">colocated multiple-input multiple-output...

Reconfigurable Intelligent Surface (RIS) can improve the security of physical layer wireless communication by adjusting phase reflective unit. After analyzing common theoretical models and potential problems, this study proposes an alternative iterative model based on multiple input output (MIMO), designs transmitter, channel receiver. In addition, passive beamforming precoding matrix RIS was j...

<span>In this article, a planar monopole two-element multiple input output (MIMO) array has been designed and characterized with the intention of ultra-wideband (UWB) applications. The voltage standing wave ratio (VSWR) working bandwidth (BW) 13.258 GHz between 3.394-16.652 GHz, fractional BW (FBW) 132.28% respect to center frequency 10.023 GHz. two elements MIMO are 900 polarizations mis...